I am trying to use matlab to find the roots of a quadratic by the standard iterative techniques. I am totally on top of all this work in theory and in practice when it comes to doing it with a calculator or Excel, but I have never used matlab before and I have been given the code below to use. The trouble is I don't know how I am s'posed to enter the equation that I am using for the iteration. Suppose the equation was x^2 - 4x -11 = 0 Then I obviously need to get the computer to recognise that I want to find the fixed point of x = (4x+11)^.5 But where do I tell the computer that this is the equation I want to solve? Here is the code I was given. I suppose it must have something to do with "Gather input data"? % programme Bisection % Bisection method for finding root of equation % Algorithm from Burden & Faires page 47 % % Gather input data a = input('Input lower endpoint: '); b = input('Input upper endpoint: '); tol = input('Input tolerance: '); Nmax = input('Input maximum number of iterations: '); count = 1; fa = f(a); % Iterate while count <= Nmax p = a + (b-a)/2; fp = f(p); % Test for finish if or(fp == 0, (b-a)/2 < tol) disp('Calculated root is: '); disp(p); disp('Number of iterations was: '); disp(count); return; end count = count + 1; % Compute next interval if fa*fp > 0 a = p; fa = fp; else b=p; end end % If we get here then no root was found disp('Method failed: Number of iterations: ') disp(count); Thankyou very much in advance.